Nuvoton Technology's NuMicro® M467 series features a Hyper Bus interface, enabling seamless expansion of large-capacity external RAM with support for HyperRam up to 256 Mbits.

Key Features of HyperRam:

• Expands MCU external data RAM
• Ultra-low power consumption
• Simple interface design for efficient PCB space utilization
• Cost-effective alternative to SDRAM expansion solutions

The Hyper Bus interface comprises 13 data and control lines, ensuring a compact design and reduced PCB footprint, as illustrated below:

With high-speed read/write capabilities, the Hyper Bus interface supports clock frequencies up to 90 MHz, achieving a parallel data transfer rate of 1440 Mb/s, meeting the demands of high-speed data access applications.

In terms of power efficiency, HyperRam offers significant advantages over SDRAM, making it suitable for low-power applications, as depicted below:

HyperRam provides a higher cost-performance ratio than SDRAM of equivalent capacity, making it a preferred choice for cost-sensitive applications.

For customers interested in HyperRam, detailed IC information can be found on the Winbond Electronics official website: HYPERRAM - Mobile DRAM - Winbond

NuMicro® M467 Series Overview:

The NuMicro® M467 Ethernet/Crypto series is a 32-bit microcontroller based on the Arm Cortex-M4F core, featuring a DSP instruction set and single-precision floating-point unit (FPU). It is ideal for IoT gateways, industrial control, telecommunications, and data centers. The M467 Ethernet/Crypto series operates at speeds up to 200 MHz, supporting a wide voltage range from 1.7 V to 3.6 V and a wide temperature range from -40 °C to 105 °C. It offers multiple packaging options and outstanding anti-interference characteristics with ESD HBM of 2 kV and EFT of 4.4 kV.

The M467 Ethernet/Crypto series integrates up to 1024 KB of dual-bank Flash memory for program storage and 512 KB of SRAM for program execution. To optimize overall system performance by reducing core data movement, the series provides 2 sets of PDMA (peripheral direct memory access) with 32 channels.

The M467 Ethernet/Crypto series supports a rich array of peripheral interfaces, including Ethernet 10/100 MAC, hardware encryption/decryption engine, hardware key storage, true random number generator (TRNG), audio PLL, Hyper Bus interface, 4 CAN FD channels, 1 USB high-speed OTG, 1 USB full-speed OTG, up to 24 channels of 16-bit PWM output, 10 UARTs, 4 SPI/I²S, 2 Quad-SPI, 5 I²C, and a real-time clock (RTC).

Additionally, the M467 Ethernet/Crypto series integrates several analog interfaces, including 4 analog comparators, 3 sets of 12-bit SAR ADC (up to 28 channels), and 2 channels of 12-bit DAC.